Correlated evolution of genome size and cell volume in diatoms (Bacillariophyceae)
Correlated evolution of genome size and cell volume in diatoms (Bacillariophyceae)
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DOI：
10.1111/j.1529-8817.2007.00452.x
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发表时间：
2008-02-01
影响因子：
2.9
通讯作者：
Moline, Mark A.
中科院分区：
文献类型：
--
作者：
Connolly, Jessica A.;Oliver, Matthew J.;Moline, Mark A.
基因组大小和细胞体积之间的相关性已经在不同的真核生物组合中观察到。我们在硅藻(硅藻)中研究了这种关系，硅藻是一门细胞体积具有关键的生态和生物地球化学重要性的门。除了测试现存物种之间是否存在预测关系外，我们还测试了基因组大小的进化差异是否与细胞大小的进化差异相关(使用独立的对比)。我们使用流式细胞仪估计了16种硅藻的总DNA含量，并使用比例方程的临界尺寸估计了细胞体积。我们的独立对比分析表明，基因组大小和细胞体积之间存在显著的相关进化。然后，我们探索了这种进化关系的进化和生态影响。硅藻细胞体积是全球碳循环的重要组成部分；因此，了解硅藻基因组进化的机制具有进化和生态意义。
A correlation between genome size and cell volume has been observed across diverse assemblages of eukaryotes. We examined this relationship in diatoms (Bacillariophyceae), a phylum in which cell volume is of critical ecological and biogeochemical importance. In addition to testing whether there is a predictive relationship across extant species, we tested whether evolutionary divergences in genome size were correlated with evolutionary divergences in cell size (using independent contrasts). We estimated total DNA content for 16 diatom species using a flow cytometer and estimated cell volumes using critical dimensions with scaling equations. Our independent contrast analyses indicated a significant correlated evolution between genome size and cell volume. We then explored the evolutionary and ecological implications of this evolutionary relationship. Diatom cell volume is an important component of the global carbon cycle; therefore, understanding the mechanisms that drive diatom genome evolution has both evolutionary and ecological importance.